Trek 212HS User Manual
Model 212HS
Charge-to-Mass Ratio (Q/m)
Test System
! A Q/m analyzer that
avoids the creation
of measurement
errors associated
with traditional
"blow-off”
measurement
techniques
!
! Accurately determines
the charge-to-mass
ratio characteristics of
Trek's Charge-to-Mass Ratio System (Model 212HS) is a portable
Q/m analyzer that utilizes the “draw-off” toner transfer method
to provide repeatable, highly accurate toner/powder charge
measurements. Due to its small size and weight, the instrument
is highly portable, making it an excellent choice for use directly
on the production line or in the laboratory.
The TREK Model 212HS system employs a unique specimen
separation and transfer technique that avoids the creation of
measurement errors due to the undesired additional charging of
test specimens sometimes caused by the rapid air movement
associated with "blow-off" type measurement systems. The unit
is configured as a separate main indicator unit, a plug-in sample
cell unit, and a plug-in absorption nozzle unit to allow for different
configurations in response to various user applications. A two
position switch selects pump strength for normal or high
application needs, such as for measuring charge on single
component toners (when stronger suction is required).
All measurement data is displayed on a front panel read-out and
is available as analog voltage data on output 1 (absorption
nozzle data) and output 2 (sample cell data) rear panel BNC
connectors. Data can be temporarily stored to on-board system
memory with the push of a button and then saved more
permanently to a personal computer.
NOTE: Measuring toner/powder mass requires the use of a weigh
scale which is not included with this Charge-to-Mass Ratio Test
System.
electrophotographic
toners or other
powders
!
Designed to handle
!
single and dual
component toners
!
! Employs a unique
specimen separation
and transfer technique
!
! Measurement Data
memory function
equipped
!
! Able to store data to a
PC through the USB
terminal
!
! RoHS compliant (EU)
!
! CE compliant
Measurement and Power Solutions
www.trekinc.com
TM
Model 212HS Specifications
Model 10/40A Specifications
Performance Features (cont.) General (cont.)
Measurement Range
0.000 to ±1.999 microcoulombs.
(other ranges available as options)
Measurement Resolution
0.001 mC (1 nC).
Accuracy
Monitor Output
Better than 0.2% of full scale.
DPM Display Output
±0.25% of full scale.
Vacuum Pressure
10 kPa.
Normal Absorption (Nozzle Unit)
50 Hz: 6.0 to 6.5L / minute
60 Hz: 6.0L / minute
Maximum Absorption (Nozzle Unit)
50Hz: 11.6L / minute
60 Hz: 10.6L / minute
Features
Front Panel Features
Display Operation Touch Screen
Displays measured values and
saved data. The Reset functions
and the Pump ON/OFF function are
accessed through this screen.
Reset Function 1
Used to reset the coulombmeter
for the Absorption Nozzle Unit to
zero.
Reset Function 2
Used to reset the coulombmeter
for the Sample Cell Case to zero.
Display Function 1
A display to indicate the charge
transfer to the Faraday cage in the
Absorption Nozzle Unit.
Display Function 2
A display to indicate the charge
transfer from the Faraday cage in
the Sample Cell Case.
Power Switch
Power ON/OFF
USB Connector
Two (2) USB ports (one active; one
reserved for future use) to connect
the main unit to a personal
computer.
Rear Panel Features
Fuse Holder
Houses the AC line fuse (250V/3A).
AC Input
Connects the AC line cord that
provides AC power to the unit.
Ground Terminal
Must be connected to a common
ground point.
Flow Rate Adjustment
Adjusts air flow rate on the vacuum
suction.
Air Outlet
Expels internal air pump exhaust.
Analog Output Connector 1
BNC connection to output the
analog data of channel 1 to an
oscilloscope or other external
device. Scale factor is 1 V/1µC.
Analog Output Connector 2
BNC connection to output the
analog data of channel 2 to an
oscilloscope or other external
device. Scale factor is 1 V/1µC.
Side Panel Features
Air Inlet
Receptacle used to connect the
socket of the absorption needle
unit.
Analog Input Connector 1
Accepts the BNC connector from
the absorption needle unit.
Analog Input Connector 2
Accepts the BNC connector from
the cell case unit.
Switch Input Connector
Receptacle used to connect the
switch connector from the
absorption needle unit.
Nozzle Holder
Receptacle used to hold the nozzle
casing of the absorption nozzle unit.
Cell Case Holder
Used to hold the cell case unit.
General
Main Indicator Unit
Dimensions
280mm H x 220mm W x 280mm D
(11.0² H x 9.0² W x 11.0² D).
Mass
8 kg (18 lb).
Power Requirements
Factory set for one of three ranges:
100 V AC, 115 V AC, or 230 V AC at
48 to 63 Hz (all ±10%)
Cell Case Unit
Dimensions
45mm H x 70mm W x 54mm D
(1.70” H x 2.75” W x 2.13” D).
Mass
150 g (5.29 oz).
Stainless Steel Mesh (supplied)
Plain Woven No. 400
28.7 mm diameter,
33 mm opening,
27.8% opening ratio.
Absorption Nozzle Unit
Dimensions
1700 mm L, including tube.
(66.93² L, including tube).
Mass
350 g (12.34 oz).
Operating Conditions
Temperature
5°C to 35°C.
Included Accessories
Type #2 filter papers (H6001), extra
#400 stainless steel mesh screens,
line cord, and manual.
Nozzle Filter Section
Nozzle Filter set (filter case, nozzle
hose, filter case stopper, and
silicon tubes).
Cell Case Section
Sample Cell Case (with cell case,
cell case stand, and cell case
stopper).
Optional Accessory
Carrying case.
Certification
TREK, INC. certifies that every Model
212HS Q/m Test System is tested and
calibrated to specifications using
measurement equipment traceable to
the National Institute of Standards and
Technology or traceable to consensus
standards.
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
Copyright ã 2011 TREK, INC. All specifications are subject to change.1144/DEC
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