Difference between revisions of "Voltcraft M-4650CR"
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See [[Multimeter ICs#Alternative_Protocol]]. | See [[Multimeter ICs#Alternative_Protocol]]. | ||
{| class="wikitable" | |||
! Baud !! Databits !!Stoppbits !! Parity !! Hard.-hands. !! Soft.-hands. !! DTR !! RTS | |||
|- | |||
| 1200 || 7 || 2 || no || no || no || enable || disable | |||
|} | |||
== Resources == | == Resources == | ||
Latest revision as of 13:05, 26 August 2014
 | |
| Status | supported |
|---|---|
| Source code | serial-dmm |
| Counts | 20000 |
| IEC 61010-1 | — |
| Connectivity | RS232 |
| Measurements | voltage, current, hFE, logic, capacitance, frequency, resistance, continuity, diode |
| Features | hold, relative, min/max, bargraph |
| Website | conrad.de |
The Voltcraft M-4650CR is a 20,000 counts, handheld digital multimeter with RS232 connectivity.
It is a rebadged Metex M-4650CR.
Hardware
Multimeter:
- Main IC: Metex 89CR (markings: "Metex 89CR 1146 1G1")
- 8-line to 3-line priority encoder: 2x 74HC148A (markings: "T 91 16H 74HC148A")
- 2x CD4010BE
- T 91 05H 74HC08A
- M 14027B XXEW045
- M 14512B XXGF111
- TC 7129CKW 9129BCJ
- 2x B6 LTV817
- Fuse: 2A/250V fast (5x20mm) (for the A jack; the 20A jack is unfused!)
RS232 cable:
Photos
Multimeter:
Device, front
Display
Cable:
See Device_cables#Metex_5-pin_RS232_cable.
Protocol
See Multimeter ICs#Alternative_Protocol.
| Baud | Databits | Stoppbits | Parity | Hard.-hands. | Soft.-hands. | DTR | RTS |
|---|---|---|---|---|---|---|---|
| 1200 | 7 | 2 | no | no | no | enable | disable |