技術支援

1. 如何證明 M3510A 每秒可以達到 50000 筆的讀值?

請點這裡

2. 如何證明 M3500A 每秒可以達到 2000 筆的讀值?

請點這裡

3. 請問如何變更 M3500A 的電源線電壓設定?

Suppose your condition is in AC 100V and you want to convert the voltage to the 220V.

【Step 1】Verify that the meter is disconnected as shown as the Figure 2-1.

【Step 2】Open the voltage setting selector cap as shown as the Figure 2-2. (You might need a pair of tweezers to do so)

【Step 3】Remove the red voltage setting selector from the right middle seam as shown as the
Figure 2-3. (You might need a pair of tweezers to do so)

【Step 4】Turn it over to 220V position as shown as the Figure 2-4.

【Step 5】Insert the voltage setting selector back into the socket and close the cap as shown as the Figure 2-5.

4. 請問電源線的保險絲如何更換?

【Step 1】Verify that the meter is disconnected as shown as the Figure 2-6.

Figure 2-6

【Step 2】Open the voltage setting selector cap as shown as the Figure 2-7. (You might need a pair of tweezers to do so)

Figure 2-7

【Step 3】Remove the red voltage setting selector from the right middle seam as shown in Figure 2-8. (You might need a pair of tweezers to do so)

Figure 2-8

【Step 4】Remove the broken fuse from the selector as shown in Figure 2-9.

Figure 2-9

【Step 5】Replace with the new fuse as shown in Figure 2-10.

Figure 2-10

【Step 6】Insert the voltage setting selector back into the socket and close the cap as shown in Figure 2-11.

Figure 2-11

【Step 7】Make sure the power switch on the front panel is in "Power OFF" condition before
plugging as shown in Figure 2-12.

Figure 2-12

Power switch:

 "POWER OFF"

【Step 8】After finishing the above procedures, you can plug in your power cord as shown in
Figure 2-13.

Figure 2-13

【Step 9】Press on the power switch on the front panel for activating M3500A as shown in
Figure 2-14.

Figure 2-14

Power switch:

 "POWER ON"

5. 請問 M3500A 的熱電耦的溫度量測轉接器是提供哪一種接頭插座?

Our thermocouple adapter provides standard sockets for both mini connecters and standard connecters.

6. 二線電阻與四線電阻量測有何不同?

The 2-wire method is commonly used as it is the simplest and most straightforward method. In 2-wire, you can get accurate measurements above 100 kΩ relatively easily. For precision measurements with resistances (ohms) below 100 kΩ, 4-wire works more reliably and conveniently than 2-wire. 4-wire requires 4-wire switching and more cabling. You may decide the tradeoff is acceptable, depending on the accuracy versus complexity requirements of your system.

The following figure shows a 4-wire resistance (ohms) measurement, including lead and switching resistance:

Current (amps) is forced through the source leads (HI, LO). As a result, a voltage develops across the resistance (ohms) under test. By measuring the voltage directly across the resistor using the sense leads, the voltage drop of interconnects (RLEAD) is ignored.

7. "STEP" 跟 "SCAN" 功能鍵有何不同?

The difference is the "delay time setting". For "STEP", the delay time setting is between each channel. For SCAN, the delay time setting is between a 10-channel turn to another.

8. 如果我沒有將多點掃瞄卡鎖上螺絲,是否會影響量測結果?

It doesn't matter. However, we suggest that you may fix screws for the better measurement. The metal flakes with the screws connect to the chasses ground; as a result, fix screws could reduce the environmental noise and statics.

9. M3500A 透過 USB 可連結多少台儀器?

The USB supports up to 127 different devices. Additional USB devices are connected through hubs in a tiered star topology which consists of multiple USB peripherals connected to a single USB hub and multiple USB hubs connected in a chain, one to another.

10. 如果PC中沒有 Microsoft Office系統,是否有其它程式能將 M3500A 量測的資料傳送至 PC?

Yes. We provide a free stand-along program "AP" for customer to transfer the measured data from M3500A to PC even they do not install「MicrosoftR Office」.

11. 可透過哪些作業系統操作我們的儀器?

Win 98, ME, 2000, XP

12. 必須要有 M3500A-opt02 才能連接 thermocouples connecter 嗎?

Yes. You will need Thermocouple adaptor to connect the mini thermocouple connecter.

13. RTD 是三線或四線?

Our M3500A provide 3 wire and 4 wire RTD measurement.

14. 如何透過多點掃瞄卡量測電流?

M3500-opt01 Multi-point Scanner Card is not allowed of direct current measurements; however, on-card shunt resistors can be installed for channels 1 and 6 to allow for indirect current measurements. The figures below show the typical configuration for current measurements.

The current through each shunt resistor can be calculated as follows:

I= current being determined

V= voltage measured by multimeter

R= shunt resistance value

Instead of manually calculating current, set up a MX+B math calculation function. (M=1/R and B= 0.). The M3500A will then display the actual current value.

Note: If there are two devices under test, the value of User-installed Shunts(R) have to be the same.

15. M3500A 使用熱電偶(Thermocouple)量測溫度方法?

M3500A supports 7 types of Thermocouple: E, J, K, N, R, S and T. Via thermocouple adapter, user must measure a known temperature junction (T1) and then modulate the value of reference junction according to the result. The value of reference Junction must be stable, so that user can measure an accurate temperature.

How to modulate the value of reference junction for thermocouple measurement:

1. Configure the thermocouple type and unit. Pressing CONFIG >> SHIFT >> TEMP(TCOUPL), and then using PREV and NEXT to select the type and unit.

2. Measure a known temperature junction (T1). The result of the measurement is Tm.

3. Modulate M3500A reference junction to make Tm=T1.
Reference junction modulation:
Panel:
CONFIG >> SHIFT >> TEMP(TCOUPL) >> NEXT >> NEXT >> SIMULATE >> ENTER
Pressing 「PREV」 or 「 NEXT」 and 「RANGE」 to modulate the reference junction.
PC remote control Command:
「:TCO:RJUN:Sim value」

Example:
If the reference junction=23.0°C, T1=30°C,Tm=25°C, we should modulate the reference junction to 28.0°C to make Tm=30°C.?

16. Regarding the M3500A, what is the measurement speed of USBTMC?

請參考 M3500A measurement speed of USBTMC table.

17. 何謂 USBTMC?

USBTMC 是 USB Test & Measurement Class 的簡稱。只要含有 USB 介面的儀器符合 USBTMC,在不受任何平台和環境的限制下,即可透過 VISA 驅動儀器,並與 PC 進行通訊。換言之,透過 VISA 對 USBTMC 儀器的控制,與透過含 GPIB 介面儀器的控制,其程序與操作是一樣的。
USBTMC(USB Test & Measurement Class):USBTMC是建立在USB之上的一種通訊協定。只要含有 USB 介面的儀器符合 USBTMC,在不受任何平台和環境的限制下,即可透過 VISA 驅動儀器,並與 PC 進行通訊。透過 USBTMC 及 USB488 協定,能像控制 GPIB 一樣來控制 USBTMC 且同時支援觸發 等其他 GPIB 的命令。使用 USBTMC 的好處是不需要增加任何介面,也不需要重新編寫程式, 經搜尋儀器後,只要使用符合 USBTMC 協定的 VISA 層,就可透過 USB 來實現 GPIB 的通訊 方式。只要作業系統上安裝 NI-VISA 3.1 以上版本的驅動程式後,USBTMC 的裝置就能夠被 識別且可以使用。

參考網站:http://digital.ni.com/public.nsf/allkb/044fa220f32774ed86256db3005850ca .

本公司積極研發 M3500 的 USB 介面已完全符合 USBTMC 的協定,使用者不需要再購買 GPIB 介面卡, 只要利用 USB 介面就可以完全摸擬 GPIB 介面的控制,而達到完全相同的控制功能。而使用者只須到 NI的網站(www.ni.com/visa)下載驅動程式後,再安裝本公司的應用軟體 PT-TOOL、 PT-LINK,就可以 利用 PT-TOOL、PT-LINK 或是自己編寫程式,就能夠控制 M3500A 了。
必須注意的是,不是所有 USB 埠的裝置都支援 USBTMC。製造商必須在裝置韌體上提供 USBTMC 才可以。 不過還是要參考儀器文件來判定是否支援 USBTMC。
請開啟參考程式碼 C 語言範例程式為控制 USBTMC 及 GPIB 的差異處(紅色部分為主要的差異),可以很清楚的看到, 程式碼幾乎完全一樣!

參考程式碼

18. Could you provide M3500A Comparison sheet?

請參考 M3500A Comparison sheet.

19. How to remote the STEP of 10 channels at same speed as when local?

Please set trigger time by pressing the buttons on the front panel.

MENU -> NEXT to TRIG -> ENTER -> NEXT to DELAY -> ENTER.

The problem is regarding the time setting of trigger delay. Then, please in the PT-TOOL software input the remote control command for speeding up the scan capability.

"TRIG:DELAY 0.1".

20. Why did the instrument measure the correct value of temperature at the beginning, but the value become unstable after a few minutes?

Please do the warm-up step in two hours for solution. Because the temperature of the instrument and the adapter must be the same so that measuring the value will be stable. To do the warm-up step can let the instrument and the adapter with the same temperature.

21. If install PT-link (Ver2.0) and connect M3500A (Ver 02.-01-01-04) through USB, a message appears to the effect that necessary software is not installed. After that, we turn off and then on the M3500A, no such message pops up , but the PT-Link cannot recognize the M3500A?

Please confirm the version of NI visa is 3.1 or upward. If it is incorrect, please refer to our User guide in CD we enclosed with the Instrument to link the NI website and download the correct NI Visa to operate.

22. 如何以 M3500A 及 Power supply 取代 Source Meter 量測 IV 曲線?

【Step 1】若欲以 M3500A Digital Multimeter 及 Power Supply 取代 Source meter 量測電池的 IV 曲線,將直接使用電錶的量測電流功能,如圖一所示為一簡單的接線圖,將電錶串聯於待測物及 Power Supply 的中間,並直接讀取 Power Supply 的電壓值及電錶的電流值,再轉換成 IV 曲線,但量測結果往往造成量測誤差,此量測誤差來自於電錶的 Burden Voltage 造成,為改善此量測誤差,可使用 M3500A 的多通道量測卡(SCANNER CARD)將電錶設成量測電壓功能,並可同時藉由 Scanner Card 量測多點電壓,其接法如圖二所示。

Figure 1

【Step 2】將 R_shunt 電阻接於待測物及 Power Supply 之間,則電流將流經 R_shunt 產生一電壓 VR_shunt,以 M3500A 的 Scanner Card 的 CH1 量測待測物電壓,CH2 量測 VR_shunt 電壓,再將 VR_shunt/R_shunt 得到電流值 I,就可劃出正確的 IV 曲線,並減少 Burden Voltage 所造成的誤差。

Figure 2

1. 請問 PC 要如何透過 USB 來控制 G5100A?

只須到 NI 的網站 www.ni.com - NI-VISA 下載驅動程式後,開機接上 USB,PC 成功辨識 G5100A,就可以透過本公司的應用軟體 Wavepat 或是自己編寫程式,來控制 G5100A 了。

2. 請問要如何用 G5100A 產生只有直流的電壓位準?

PICOTEST G5100A can output DC voltage in the range of -5 V DC to +5 V DC (into a 50-ohm termination).

To output a DC voltage from a G5100A:

  1. Press [Utility] and choose “DC ON”.

  2. Press soft-key [Vos] to activate the DC mode with the offset voltage as the output level. (0V default)

  3. Using the knob or numeric keypad to modulate the level you desired.

  4. press normal function keys to return to normal waveform operation.

3. 如何才能將 G5100A 的警告音及操作音關閉?

在 G5100A 的韌體版本1.6(含)前只有關閉系統警告音,而不能關閉操作時的聲音。只有韌體版本1.7以上才可以分別關閉系統警告音及操作音。以下是音效開/關步驟。

  1. Press [Utility] and choose “System”.

  2. Press soft-key [Sound] to on/off the sound of operation keys or press [Beep] to on/ off the warning beep.

  3. Press [DONE] back to normal operation.

4. 何處可以取得 G5100A 的應用程式及使用手冊等資料?

所有的資料您都可以從附在儀器中的光碟片中取得,或者您可以到 PICOTEST 網站的技術支持頁面下載儀鼎儀器所有最新版的應用軟體程式、韌體更新程式或使用手冊等資料。

5. 如何使用 Pattern Output 功能?

G5100A waveform generator provides the capability of outputting a specified pattern of up to 256k points in 16-bit resolution. Similar to arbitrary waveforms, pattern output provides five built-in patterns and up to four user-defined patterns that are stored in non-volatile memory. The built-in patterns are exponential-rise, exponential-fall, negative-ramp, sinc, and cardiac. The default pattern output is an exponential-rise wave.

You may use the Wavepatt®, waveform and pattern editor to create the patterns you want or import the waveforms from the oscilloscope that you captured previously and follow below steps to set up pattern output.

  1. Press the Utility button to enter the utility menu.

  2. Press the softkey under [PATT MODE] to enter the PATTERN menu.

  3. Press the softkey under [Fclk/Perd] to toggle between [Fclk] (frequency) and [Perd] (period).

  4. Press the softkey under [Start Addr]/ [End Addr] for setting the start /end point of the pattern to output. Use the knob with the cursor keys to change the value. Or use the numeric keypad to enter a new value and then press [Enter] to finish the entry or the press [Cancel] to withdraw the changes.
     

  5. Press the [Select wform] to enter selection menu:

    1. Press [Built In] and choose the desired pattern from the five built-ins by pressing the corresponding softkey.

    2. Press [Saved Wform] and choose the desired user-defined pattern by pressing the corresponding softkey.

    3. One may delete a user-defined pattern by pressing the softkey under Delete Store and choose the pattern to delete by pressing the corresponding softkey

  6. Press the [Output Setting] and then press [RPT.] to toggle between ON and OFF to enable/disable repeating output of the pattern.

  7. To configure the trigger setting, press [Trig Setup] to enter the trigger setup menu:

    1. To specify the trigger source, press the softkey under Src and then select among Ext (external) and Man (manual).

    2. If manual trigger is selected, you may configure the trigger out signal by pressing the softkey under Trig Out and then select among OFF, rising-edge trigger and falling-edge trigger.

    3. If external source is selected, you may press the softkey under Slope to toggle between rising edge trigger and falling edge trigger.

    4. Press the softkey under DONE to finish the trigger setting.

  8. After completed above setting. Press function key [Output] to generate the pattern out. The pattern would be outputted once only if the setting of [RPT.] is OFF in the [Output Setting].

1. 請問 U6200A 的一般電源消耗為多少?

在標準配備下,一般消耗電源為 24VA;而主機在全配備下,消耗電源為 50VA(Max)。

2. 請問可否設定終端阻抗為50Ω?

是的,終端阻抗可設定成為50或1MΩ;請按按鍵CH1/CH2,可看見輸入條件,此時在 Imped 處按下按鍵即可進行設定。

3. 當選擇 rear input 時,輸入端是否有與大地隔離?

是的,前端與後端輸入,都有與大地隔離。

4. 請問是否可允許同時將前端和後端,輸入4個不同的訊號?

是的,您可以同時將前端和後端,輸入4個不同的訊號;藉由切換內部的 relays 來做選擇量測輸入。