MASTECH MS6514

MASTECH_MS6514

Status	in progress
Source code	mastech_ms6514
Connectivity	USB/serial
Measurements	temperature
Features	data hold, min/max/avg
Website	mastech-group.com

The MASTECH MS6514 is a logging thermometer with two thermocouple inputs and USB connectivity. It supports K,J,T,E,R,S,N thermocouple types.

The device sends temperature measurements at appr. 2 Hz to the host.

Hardware

• TODO
• SiLabs CP2102 USB interface chip.

Photos

• 

  Device, front

• 

  Device, connectors

• 

  PCB, front

• 

  PCB, back

• 

  PCB, back, part 2

• 

  PCB, back, part 3

• 

  LCD, all segments on

Protocol

The device communicates with the host via a SiLabs CP2102 USB interface chip. Communication parameters are 9600_8_N_1. Live data is transmitted as soon as the button Setup/PC-Link is pressed for 3 seconds.

Commands

Byte	Description
0xA1	Start sending stored data

Received data

Byte	Bit	Description
0		Always 0x65
1		Always 0x14
2	0	1=READ of stored values, 0=LIVE data
4..3		Index of stored value (0..999) oldest is 0
6..5		Temperature main display (absolute value without sign)
8..7		Temperature aux display (absolute value without sign)
9	5..4	Mode: 10=SETUP, 11=READ
	2..0	Thermocouple type (1=K, 2=J, 3=T, 4=E, 5=R, 6=S, 7=N)
10	6	Hold (1=HOLD, 0=not HOLD)
	5	Record active (1=REC, 0=not REC)
	1..0	Unit (1=°C, 2=°F, 3=K)
11	7	Sign temperatue main display (1=negative, 0=positive)
	6	Overload temperature main display (1="OL" on LCD)
	3	Factor temperature main display (1 means divide by 10)
	1..0	Function main and aux display (00=T1 on main, T2 on aux; 01=T2 on main, T1 on aux; 10=T1-T2 on main, T1 on aux; 11=T1-T2 on main, T2 on aux)
12	7	Sign temperatue aux display (1=negative, 0=positive)
	6	Overload temperature aux display (1="OL" on LCD)
	3	Factor temperature aux display (1 means divide by 10)
	1..0	Function aux display (0=no active, 1=MAX, 2=MIN, 3=AVG). If >0 function defined in byte 11, bit 0-1 is overriden.
13		Hours (hh)
14		Minutes (mm)
15		Seconds (ss)
16		Always 0x0D
17		Always 0x0A