Trek 156A User Manual
Model 156A
Charged-Plate Monitor
Is your ionizer neutralizing
efficient and cost effective?
charges as quickly and
completely as needed?
Is the ion output
balanced?
Can you evaluate your
ionizers while they are
installed in production?
Is the recording of your
ionizer test data
Importance of Ionization Monitoring
The Trek Model 156A Charged-Plate Monitor will The Model 156A tests the efficiency of your
enable you to confidently answer the above ionizer’s ion production by timing how long it
questions so that you can effectively monitor and takes air ions produced to discharge a floating
maintain your ionization program. plate that has been pre-charged to either a
· Use the Model 156A to verify that new
ionizers meet your selection criteria.
· When evaluating newly setup or active ionizer
installations, use the Model 156A to
determine if the decay times and ion balance
performance are satisfactor y for your
application.
· Use the compact and portable Model 156A to
determine w h e n an i o n i z e r nee d s
maintenance.
The Model 156A Charged-Plate Monitor is an
important tool for evaluating the performance of
the air ionizers used to neutralize static charges.
Trek offers the Model 156A/1 with a computer
interface option. This option adds both a serial
communications port and an applications
software program to operate, analyze, and save
data from the charged-plate monitor to a
computer.
positive or negative value. The Model 156A also
tests the balance between positive and negative
air ions by measuring the offset voltage
generated on a floating plate due to an imbalance
of positive and negative air ions impinging on the
plate from your ionizer.
Typically, as the ionizer ages, the rates of positive
and negative air ion production decline.
Consequently, the time required for the ionizer to
neutralize static charges increases, and the
balance of positive and negative air ions
changes.
The neutralization (decay) time may become too
long for the ionizer to fully neutralize charges that
are generated at a work location, or the ionizer
may begin to charge objects that were initially
uncharged.
By using the Model 156A to periodically measure
the decay times and the ion balance, the need for,
and fr eque ncy of, i oniz er prevent ative
maintenance can be easily determined.
Measurement and Power Solutions
www.trekinc.com
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Model 156A Specifications
Model 10/40A Specifications
Performance Features (cont.) Features (cont.)
Monitored Voltage Range Test/Reset Control (cont.)
0 to ±1100 V DC or peak AC.
Small Signal Bandwidth (-3 dB)
DC to 1 kHz (measured at 20 V p-p). than the programmed start voltage and
Large Signal Bandwidth
DC to 10 Hz (measured at 2000 V p-p).
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
Unit and software programmable
from 1 to ±1000 V in 1 V increments.
Start Accuracy
Unit and Software within ±1 V of
programmed start voltage.
Stop Voltage
Unit and software programmable
from 0 to ±999 V in 1 V increments.
Stop Accuracy
Unit and Software within ±1 V of
programmed stop voltage.
Plate Self-Discharge (unpolarized)
Less than 12 V/minute.
Features
Mode Select
A three-position toggle switch selects the
+Decay, -Decay, or Float mode of
operation. This switch is also used in
combination with the Test/Reset Control
switch to program the START and STOP
voltages.
Test/Reset Control
A momentary toggle switch used in
conjunction with the Mode Select switch
to program the START and STOP voltages.
+Decay and -Decay Modes
Sets the plate voltage to a value greater
resets the decay timer to zero.
Float Mode
Sets the plate voltage to 0 V ±2 V.
Voltage Monitor Output
A BNC providing a low voltage replica of
the plate voltage.
Scale Factor
1/200th of the plate voltage.
DC Accuracy
Better than 0.1% of full scale.
Offset Voltage
Less than ±10 mV.
Output Noise
Less than 10 mV rms (measured
using the true rms feature of the
Hewlett Packard Model 34401A
digital multimeter).
Output Impedance
Less than 0.1 W.
Plate Voltage Digital Panel Meter
3 ½ digit red LED display.
Range
0 to ±1100 V.
Resolution
1 volt.
Accuracy
Better than 0.1% of full scale ±1
count.
Decay Time Digital Panel Meter
4-digit red LED display.
Range
0 to 9999 seconds.
Resolution
0.1 seconds, from 0.1 to 999.9
seconds; 1 second, from 1000 to
9999 seconds. (The display will
indicate “- - - -” when the decay time
exceeds 9999 seconds.)
Copyright © 2011 TREK, INC. All specifications are subject to change. 1123/DEC
Ion Collecting Plate (standard option)
Dimensions
15 cm x 15 cm square, (6”x 6” square).
Capacitance
20 pF ±2 pF.
(Other capacitance options available)
General
Power Requirements
Battery Eliminator/Charger
(ordered separately)
Specifications
Output Connector
2.1 mm DC power plug.
Output Voltage
12 to 14 V DC.
Output Current
1 A.
Battery Operation
Rechargeable battery, supplied.
Operating Time
8 hours from a full charge (156A).
Recharge Time
3 hours to full charge.
Other
Low battery indicator.
Full charge indicator.
Operating Conditions
Temperature
5 °C to 35 °C.
Relative Humidity
To 80%, noncondensing.
Instrument Dimensions
83 mm H x 318 mm W x 280 mm D,
(3.25" H x 12.5" W x 11" D).
Instrument Weight
Approx. 2 kg (4.4 lb).
The Model 156A and 156A/1 are
CE Compliant
Model 156A and 156A/1 Ordering Information
Model 156A Included Accessories
Item Part No.
Charge Plate Monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . Model 156A
Charge Plate Monitor with serial interface . . . . . . . . . Model 156A/1
Computer Requirements: Windows 9X or later, NT4, PC compatible
computer, 486DX66 or better, 16 Mb of RAM, and high speed
serial port with 16550 or equivalent UART.
Ion Collecting Plates
Standard Plates (ordered separately)
15 cm x15 cm (6” x 6”) plate . . . . . . . . . . . . . . . . . . . . . . . . . . 17397
25 mm x 25 mm (1”x 1”) plate . . . . . . . . . . . . . . . . . . . . . . . . . 17375
Special Plates (ordered separately)
Custom plate sizes are available by special order.
TREK, INC. • 190 Walnut Street • Lockport, NY 14094 • USA • 800-FOR TREK
(fax) • www.trekinc.com • sales@trekinc.com 716-438-7555 • 716-201-1804
Item Part No.
Operator’s Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23126
PC Compatible Computer Software (156A/1 only). . . . . . . . . . . 43267
Banana to Banana Stackable Cord (9 ft.) . . . . . . . . . . . . . . . . . . N9044
Optional Accessories
Battery Eliminator/Charger (115 V AC) . . . . . . . . . . . . . . . . . . . . L5111
Universal AC Adapter Kit (100 to 240 V AC) . . . . . . . . . . . . . . . . 1K010
Ion Collecting Plate Tripod. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DK142
Carrying Case . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43433
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