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.

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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.)

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