Voltcraft M-3650CR
 | |
| Status | in progress |
|---|---|
| Counts | 2000 |
| IEC 61010-1 | — |
| Connectivity | RS232 |
| Measurements | voltage, current, resistance, capacitance, hFE, diode, continuity, frequency, logic |
| Features | data hold, bargraph, difference |
The Voltcraft M-3650CR is a 2000 counts handheld digital multimeter with RS232 connectivity.
It came into the market 1991 and is a rebadged Metex M-3650CR.
The device is not officially supported yet. Experimental support exists since 2013-10-23 using the driver for the Voltcraft M-3650D. Currently the logic test and hFE (Transistor) functions do not work yet.
Hardware
Multimeter:
- Fuse: 2A/250V (5x20mm) (for the A jack; the 20A jack is unfused!)
- TODO.
RS232 cable:
Photos
Multimeter:
Package
Package, open
Device, front
Device, right side
Device, back
Device, size
Device, display self test on power on.
Device with test probes
Battery pack opened
Device opened
RS232 cable:
See Device_cables#Metex_5-pin_RS232_cable.
Protocol
The protocol is (partially) documented in the manual of the Voltcraft M-3650CR and was determined completely by testing. See Multimeter ICs#Alternative Protocol.
Resources
Measurement functions and ranges
| Measurement function | Range | Resolution | Accuracy | sigrok result | Remarks |
|---|---|---|---|---|---|
| V= | 200.0 mV | 100 μV | ±(0.3% + 1) | mq V, unit V, mqflags DC | |
| 2.000 V | 1 mV | " | |||
| 20.00 V | 10 mV | " | |||
| 200.0 V | 100 mV | " | |||
| 1000 V | 1 V | " | |||
| V≈ | 200.0 mV | 100 μV | ±(0.8% + 3) | mq V, unit V, mqflags AC | |
| 2.000 V | 1 mV | " | |||
| 20.00 V | 10 mV | " | |||
| 200.0 V | 100 mV | " | |||
| 750 V | 1 V | ±(1.2% + 3) | " | ||
| A= | 2.000 mA | 1 µA | ±(0.5% + 1) | mq Curr., unit A, mqflags DC | |
| 200.0 mA | 100 µA | ±(1,2% + 1) | " | ||
| 20.00 A | 10 mA | ±(2,0% + 5) | " | Max. 20 min.; unfused! | |
| A≈ | 2.000 mA | 10 µA | ±(1,0% + 5) | mq Curr., unit A, mqflags AC | |
| 200.0 mA | 100 µA | ±(1,8% + 5) | " | ||
| 20.00 A | 10 mA | ±(3.0% + 7) | " | Max. 20 min.; unfused! | |
| Ω | 200.0 Ω | 100 mΩ | mq Res., unit Ω, mqflags - | ||
| 2.000 kΩ | 1 Ω | " | |||
| 20.00 kΩ | 10 Ω | " | |||
| 200.0 kΩ | 100 Ω | " | |||
| 2.000 MΩ | 1 kΩ | " | |||
| 20.00 MΩ | 10 kΩ | " | |||
| Cap. F | 2000 pF | 1 pF | ±(2.0% + 3) | mq Cap., unit F, mqflags - | |
| 200.0 nF | 100 pF | " | |||
| 20.00 µF | 10 nF | ±(3.0% + 5) | " | ||
| Hz= | 20.00 kHz | 1 Hz | ±(2% + 3) | mq Freq., unit Hz, mqflags DC | |
| 200.00 kHz | 10 Hz | " | |||
| Logic | - | ||||
| hFE | ? | IB=10 µA, UCE=2,8 V | |||
| Diode | mq V, unit V, mqflags DC,DIODE | ||||
| Data Hold | - | Not supported by protocol. |
The column "sigrok result" contains in short form what the driver generates for the resp. data type.