Trek's Model 157 Charged-Plate Monitor offers better accuracy,stability and bandwidth than conventional designs. It combines Trek's patented precision charge-measurement capability withfeatures that drive down ionizer maintenance and performance testing costs.
Enhanced features, such as those that enable the operator to store and retrieve data as data points or graphs and record operator comments for reference, make the Model 157 ideal for use in dissipative testing of materials and monitoring of static charge.
.Customizable measurement capacitance provides assurance that ESD process needs are met in manufacturing and that there is conformance to ANSI/ESD-STM3.1 and IEC61340-5-1 standard test methods
.Greater bandwidth enables “true” responses to be observed by avoiding the masking of results which can occur with other vendors’ systems
.Extremely low offset and drift ensures high accuracy, making it ideal for applications requiring critical ion balance such as GMR and TMR manufacturing areas
.Compact and lightweight, for easy portability within a facility
.NIST-traceable Certificate of Calibration provided with each unit
.CE compliant
Monitored Voltage Range 0 to ±1020 V DC or peak AC
Bandwidth (-3 dB) DC to 80 Hz
Zero Stability (referred to plate voltage)
Drift with Time (no incident ion flow):
Less than 6 V/minute
Drift with Temperature:
Less than 10 mV/°C, noncumulative
Decay Mode Thresholds
Start Voltage:
Programmable from 1 to ±1000 V in 1 V increments
Start Accuracy:
Within ±1 V of programmed start voltage
Stop Voltage:
Programmable from 0 to ±999 V in 1 V increments
Stop Accuracy:
Within ±1 V of programmed stop voltage
or ±0.2 V if set less than or equal to 90 V
Discharge Timer Resolution:
0.1 sec., from 0.1 sec. to 999.9 sec.
Plate Self-Discharge Rate:
Less than 12 V/minute
