NoShok 1900C Operating Manual

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• DUAL RANGE, 4 to 20 mA OR 10 to 50 mA

• 3½-DIGIT, 0.6" (15.2 mm) HIGH DIGITS

• POSITIVE IMAGE TRANSFLECTIVE LCD WITH RED BACKLIGHT

OR POSITIVE IMAGE REFLECTIVE LCD (1900C.1/1900C.2)

• POSITIVE IMAGE TRANSFLECTIVE LCD WITH RED BACKLIGHT

OR NEGATIVE IMAGE TRANSMISSIVE WITH RED OR
YELLOW/GREEN BACKLIGHT (1900C.3/1900C.4)

• SPAN AND OFFSET CAPABILITY

• NEGATIVE AND OVERRANGE INDICATION

• SELECTABLE DECIMAL POINT POSITION

• NEMA 4X/IP65 SEALED FRONT PANEL BEZEL

• FITS DIN STANDARD CUT-OUT 2.68" (68 mm) X 1.30" (33 mm)

FOR USE IN HAZARDOUS LOCATIONS:
Class I, Division 2, Groups A, B, C, and D
Class II, Division 2, Groups F and G
Class III, Division 2

DESCRIPTION

The 1900C.1/1900C.2 and 1900C.3/1900C.4 are additions to the NOSHOK

1900 Series product line. The 1900C.1/1900C.2 uses a 4 to 20 mA or a

10 to 50 mA input signal as operating power. The input signal is also used
to power the backlighting on the 1900C.2 Unit. The 1900C.3/1900C.4 uses
a 4 to 20 mA or a 10 to 50 mA input signal to power the unit. An external
power supply is used to power the 1900C.3/1900C.4 backlighting to provide
a brighter, more consistent display and a lower compliance voltage.

The units have a 3½-digit LCD display with 0.6" (15.2 mm) high digits and
a DIP switch selectable decimal point. The 1900C.1/1900C.2 display is
available in positive image reflective (dark digits, reflective background) or
positive image transflective (dark digits, illuminated background) with red
backlighting. The 1900C.3/1900C.4 display is available in positive image
transflective (dark digits, illuminated background) with red or yellow/green
backlighting or negative image transmissive (illuminated digits, dark
background) with red or yellow/green backlighting.

The ability to scale the display allows indication in any desired unit of
measurement such as temperature, pressure, humidity, fluid flow, etc. The unit
is calibrated at the factory with 0.0 displayed @ 4 mA input and 100.0 displayed
@ 20 mA input.

The units are contained in a lightweight, high impact plastic case with a clear
viewing window. When properly installed, the sealed front panel meets NEMA
4X/IP65 specifications for wash-down and dusty environments.

SAFETY SUMMARY

All safety related regulations, local codes and instructions that appear in the
manual or on equipment must be observed to ensure personal safety and to
prevent damage to either the instrument or equipment connected to it. If
equipment is used in a manner not specified by the manufacturer, the protection
provided by the equipment may be impaired.

WARNING - EXPLOSION HAZARD - SUBSTITUTION
OF COMPONENTS MAY IMPAIR SUITABILITY FOR
CLASS I, DIVISION 2 / CLASS II, DIVISION 2 / CLASS III, DIVISION 2

SPECIFICATIONS

1. DISPLAY: 3½-digit (-1999 to 1999), 0.6" (15.2 mm) high digits.

The 1900C.1/1900C.2 is available with a positive image reflective LCD

or a red backlit positive image transflective LCD. The intensity of the

backlighting will vary with the input signal.

The 1900C.3/1900C.4 is available with a positive image transflective LCD

with red or yellow/green backlighting or a negative image transmissive with

red or yellow/green backlight.

A minus sign is displayed when the indicator is adjusted for a negative offset.

Overrange: Overrange is indicated by a “1” in the most significant digit and

the blanking of the three least significant digits.

2. EXTERNAL BACKLIGHT POWER: (1900C.3/1900C.4 only)

9 - 28 V dc, @35 mA typ., 50 mA max. Power Supplies must be Class 2

(NEC) or SELV rated. Above 26 V dc, derate the operating temperature to

50°C.

3. DECIMAL POINTS: Three DIP switch selectable, decimal point positions

allow the display to be read in tenths, hundredths or thousandths.

MODELS 1900C.1/1900C.2/1900C.3/1900C.4 - CURRENT LOOP POWERED PROCESS INDICATORS

DIMENSIONS “In inches (mm)”

Note: Recommended minimum clearance (behind the panel) for

mounting clip installation is 2.15" (54.6) H x 3.00" (76.2) W.

CAUTION: Read complete instructions

prior to installation

and operation of the unit.

NOSHOK

TECHNICAL MANUAL

1900

SERIES

1010 WEST BAGLEY ROAD
BEREA, OHIO 44017

CURRENT LOOP POWERED PROCESS INDICATORS

PHONE [phone]

FAX [phone]

E-MAIL: [e-mail]
WEBSITE: www.noshok.com

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INSTALLATION

When properly installed, the 1900C unit
meets NEMA 4X/IP65 requirements for indoor
use. The units are intended to be mounted into an
enclosed panel. A sponge rubber gasket, mounting
clip, two screws, and nut fasteners are provided to
install and seal the unit in the panel cutout.

Installation Environment

The unit should be installed in a location that
does not exceed the maximum operating
temperature and provides good air circulation.
Placing the unit near devices that generate
excessive heat should be avoided.

The bezel should be cleaned only with a soft
cloth and neutral soap product. Do NOT use
solvents.

Continuous exposure to direct sunlight may
accelerate the aging process of the bezel.

The following procedure assures proper installation:

1. Cut the panel opening to the specified dimensions.

Remove burrs and clean the panel opening.

2. Slide nut fastener into slot on mounting clip and then

insert mounting screw through nut on both sides of

mounting clip. The tip of mounting screw should not project

through hole on clip.

3. Slide the panel gasket over the rear of the unit to the back of the

bezel. Install 1900C unit through panel cutout.

4. Slide mounting clip over rear of unit until the clip is against back of

panel. The mounting clip and 1900C housing have a latching feature

to hold the unit in place until tightened.

Note: Hold the 1900C front bezel in place when sliding the mounting

clip into position.

5. Alternately tighten each mounting screw to ensure uniform gasket pressure.

Visually inspect the gasket for proper seal. The gasket should be

compressed to approximately 75 to 80% of its original thickness.
(Recommended torque is 28 to 36 in-oz.)

6. If the gasket is not adequately compressed and the mounting screws cannot
be tightened any further, loosen the mounting screws and insure that the clip
is latched as closely as possible to the panel.

7. Repeat Step #6 for tightening the mounting screws.

SPECIFICATIONS (Cont’d)

4. MAXIMUM VOLTAGE DROP:

3.2 V dc for 1900C.1

4.0 V dc for 1900C.2

3.2 V dc for 1900C.3 & 1900C.4

5. EQUIVALENT RESISTANCE:

1900C.1

: 800  max. @ 4 mA; 160  max. @ 20 mA

320  max. @ 10 mA; 65  max. @ 50 mA

1900C.2: 1000  max. @ 4 mA; 200  max. @ 20 mA

400  max. @ 10 mA; 80  max. @ 50 mA

: 800  max. @ 4 mA; 160  max. @ 20 mA

320  max. @ 10 mA; 65  max. @ 50 mA

6. MAXIMUM ALLOWABLE INPUT CURRENT: 100 mA

7. SCALING RANGE:
Span: Two potentiometers provide a coarse and fine span adjustment. Span

range = 0 to 2000.

Offset: Two potentiometers provide a coarse and fine zero offset adjustment.

Offset range = -1999 to 1999.

8. LINEARITY: (@ 23°C, Less than 85% RH) ±(0.1% + 1 digit).

9. READING RATE: 2.5 per second, nominal.

10. RESPONSE TIME: 1.5 seconds to settle for a step change.

11. NORMAL MODE REJECTION: 60 dB 50/60 Hz

12. TEMPERATURE EFFECTS:

Span Temperature Coefficient: 100 PPM/°C
Offset Temperature Coefficient: 0.2 digits/°C

13. CONSTRUCTION: High impact plastic case with clear viewing window.
(Panel gasket and mounting clips included.) This unit is rated for NEMA
4X/IP65 indoor use. Installation Category I, Pollution Degree 2

14. CERTIFICATIONS AND COMPLIANCES:

ELECTRICAL SAFETY

EN 61010-1, IEC 1010-1

Safety Requirements for electrical equipment for measurement,
control, and laboratory use, Part I.

ELECTROMAGNETIC COMPATIBILITY

Notes:

1. Self-recoverable loss of performance during EMI disturbance at 10 V/m:
Process Signal may deviate during EMI disturbance.

For operation without loss of performance:

Unit is mounted in a metal enclosure (Buckeye SM7013-0 or
equivalent) connected to earth ground.

2. Self-recoverable loss of performance during EMI disturbance at 10 Vrms.
Process signal may deviate during EMI disturbance.

For operation without loss of performance:

Install 1 ferrite core, RLC #FCOR0000 or equivalent, to signal cable at
the unit.

Refer to the EMC Installation Guidelines of this bulletin for additional

information.

15. ENVIRONMENTAL CONDITIONS:
Operating Temperature: 0° to 60°C

(Derate backlight voltage to 26 V dc above 50 °C.)

Storage Temperature: -40° to 80°C
Operating and Storage Humidity: 85% max. (non-condensing) from 0°C

to 60°C.

Altitude: Up to 2000 meters

16. WEIGHT: 3.3 oz. (93.5 g)

Power mains class B

Enclosure class BEN 55011RF interference

Emissions to EN 50081-1

Level 4; 30 A/mEN 61000-4-8Power frequency magnetic fields

150 KHz - 80 MHz

Level 3; 10 V/rms

2

EN 61000-4-6RF conducted interference

Level 3; 2 Kv power

Level 4; 2 Kv I/OEN 61000-4-4Fast transients (burst)

80 MHz - 1 GHz

Level 3; 10 V/m

1

EN 61000-4-3Electromagnetic RF fields

Level 3; 8 Kv air

Level 2; 4 Kv contactEN 61000-4-2Electrostatic discharge

Immunity to EN 50082-2

1900C.3 & 1900C.4