ESD workstation Constant monitor MH20-2A

1. Controlled by DSP+CPLD, with strong anti-interference.
2. Imposed voltage on monitored object is ultra-low.
3. Protect resistance to ground on each side of wrist strap is 1Mohm
4. Check by itself at starting
5. LED lighting and sound to indicate the problem. (sound can be off)

Exact Workstation Monitor Parameter:
1). Operator(25mV imposed voltage)
A. Contact resistance alarm level: 10Mohm
B. EMI voltage alarm level: 2.5V
C. 1Mohm resistance to ground for each side metal
2). Workstation grounding resistance alarm level: 2Mohm
3). Tool grounding resistance alarm level: 10ohm
4). Resistance between monitor and ground alarm level: 10ohm

Monitored objects:
1. Operators(WS1, WS2): Resistance, voltage
2. Tools(Y1, Y2): Resistance
3. Mats(S1, S2): Resistance
4. Ground(P): Resistance

Introduction:
LED Description

Ground(Double color LED- P)
Green light- OK
Red light- The resistance between monitor and ground is out of range.
Light off- Power is off.

Body resistor(Red LED- R1, R2)
Red light- The resistance between body and ground is out of range.
Light off- OK/Wrist strap is not be used.

Body voltage(Yellow LED- V1, V2)
Yellow light- The EMI voltage on body is out of range.
Light off- OK/ Wrist strap is not be used.

Tools resistor(Double color LED- Y1, Y2)
Green light- OK
Red light- The resistance between tools and ground is out of range.
Light off- The function of tool monitor is not be used.
Mat resistor(Double color LED- S1, S2)
Green light- OK
Red light- The resistance between mat and ground is out of range.
Light off- The function of mat monitor is not be used.

Electro Parameter
1. Body resistance alarm level- 10Mohm
Body voltage alarm level- 2.5V
Imposed voltage on hand- 25mV
2. Tools grounding resistance alarm level- 10ohm
Imposed voltage on tools- 100mV
3. Mat grounding resistance alarm level- 2Mohm
Imposed voltage on mat- 200mV
4. Resistance between monitor and common ground alarm level- 10ohm
Imposed voltage on common ground- 100mV
5. Protection resistor for body- 1M ohm for each side

Machine
1 Case- Aluminum
2 Size- 98*88*40mm
3 Wire length for wrist strap- 2.8meter
4 Wire length for tools grounding- 2meter
5 Wire length for mat grounding- 2meter
6 Wire length for monitor grounding- 2meter

Input Voltage
5Vdc, 200mA

MH20-2A have same function with 3M's CTC-061, but we can provide a better price.

Any interest, please kindly let us know, we will send you the details.