LR-Cal LDM 70-K50
Reference digital pressure gauge
Accuracy ±0,25% BFSL, pressure ranges up to 600 bar

LR-Cal LDM 70-K50 digital pressure gauge

Digital pressure gauge
Accuracy ±0,25% BFSL
0...400 mbar to 0...600 bar
Display rotatable
Battery operated (2 x ½-AA)

LR-Cal LDM 70-K50 in case
(with LR-Cal LPP 40 pressure test pump)

Description

LR-Cal LDM 70-K50 description

The display is via a clearly visible 4½-digit LCD display. The front cover with the display can be rotated, which ensures good readability even under unusual connection conditions. Operation is menu-driven via three membrane keys. In addition to displaying information on the measuring range, various pressure units and the number of decimal places can be set, as well as min. and max. values. Zero and span can be recalibrated, and the instrument can be reset to factory settings at any time.

The LR-Cal LDM 70-K50 digital fine-measurement manometer is ideally suited for on-site use together with our LR-Cal pressure test pumps. In conjunction with our LR-Cal pressure comparison test pumps (spindle pumps), it is also very suitable for operation in the laboratory and in the workshop.

Features:

Compact design (DS 70)
Battery operated
Accuracy ±0.25% BFSL (equivalent to ±0.5% FSO according to IEC 60770)
4½-digit LCD display (digit height 11 mm)
6-digit additional display to show the pressure unit
Pressure unit switchable: bar/mbar, psi, mWS, inHg, cmHg/mmHg, kPa/MPa (depending on measuring range)
Good vibration and shock resistance
Protection class IP 65
Rotatable display, thus good readability in all positions
Pressure ranges from 0...400 mbar to 0...600 bar, as well as vacuum, compound and absolute ranges
integrated minimum and maximum value memory

Specification

LR-Cal LDM 70-K50 specification

Nominal case diameter	DS 70
Accuracy *)	±0.25% BFSL (equal to ±0.5% FS acc. to IEC 60770)
Pressure port	1/2" BSP male or 1/4" BSP male or 1/2" NPT male or 1/4" NPT male
Measuring rate	5 per second
Thermal effects (Offset and Span)	<=0.2% FS / 10 K
Temperature compensated range	-25...+85°C
Permissible temperatures	Medium: -20...+85°C; Ambient: -20...+70°C; Storage: -30...+80°C
Housing material	PA 6.6 Polycarbonate
Pressure port material	Stainless steel 1.4571 / 1.4435
Diaphragm material	Ceramic Al₂O₃ 96%
Gasket material	Ranges <=40 bar: FKM/EPDM; Ranges >40 bar: NBR
Display	LCD, visible size 40x30 mm, 4 1/2 digit 7 segment main display, digit height 11 mm, range ±19999; 6-digit 14 segment additional display, digit height 7.5 mm
Electromagnetic compatibility	Emission and immunity according to EN 61236
Mechanical stability	Vibration: 5 g RMS (20...2000 Hz); Shock: 100 g / 11 ms
Power supply	2 x 3.6 V 1/2 AA lithium batteries
Data memory	EEPROM (non-volatile)
Ingress protection	IP 65
Installation position	any (the instrument is calibrated in vertical position with pressure port down. If this position is changed on installation, there can be slight deviations in the zero-point.
Weight	300 g
A/D-converter resultion	10 bit
Operational life	>100 x 10⁶pressure cycles
Battery life time	approx. 5 years in standby mode

*) ±0.25% BFSL (maximum non-linearity acc. to Best Fit Straight Line method) is equal to ±0.5% FS acc. to IEC 60770 (limit point adjustment (non-linearity, hysteresis and repeatability)).

Pressure ranges

LR-Cal LDM 70-K50 pressure ranges

Pressure range [bar]	Pressure type	Permissible overload [bar]
0...0.4	gauge	1
0...0.6	gauge or absolute	2
0...1	gauge or absolute	2
0...1.6	gauge or absolute	4
0...2.5	gauge or absolute	4
0...4	gauge or absolute	10
0...6	gauge or absolute	10
0...10	gauge or absolute	20
0...16	gauge or absolute	40
0...25	gauge or absolute	40
0...40	gauge or absolute	100
0...60	gauge or absolute	100
0...100	gauge or absolute	200
0...160	gauge or absolute	400
0...250	gauge or absolute	400
0...400	gauge or absolute	600
0...600	gauge or absolute	800
-1...0	vacuum	2
-1...+0.6	compound	4
-1...+1.5	compound	4
-1...+3	compound	10
-1...+5	compound	10
-1...+9	compound	20
-1...+15	compound	40
-1...+24	compound	40
-1...+39	compound	100

Scope of standard supply

LR-Cal LDM 70-K50 scope of standard supply

Digital (reference) pressure gauge LR-Cal LDM 70-K50
2 batteries 3.6 V (½-AA), built-in
Operating manual DE+EN

Options + spare parts

LR-Cal LDM 70-K50 options + spare parts

Absolute pressure

Code: LDM70-MP-ABS

Option (surcharge):
Absolute pressure measurement
(instead of gauge pressure)
Only available for correspondingly marked measuring ranges.

Free of oil and grease

Code: LDM70-K50-MP-OX1

Option (surcharge):
Cleaned free of oil and grease
but NOT suitable for oxygen!

Suitable for OXYGEN

Code: LDM70-K50-MP-OX2

Option (surcharge):
Cleaned free of oil and grease, suitable for oxygen.
Only available for pressure measuring ranges up to and including 0...25 bar.

Factory certificate

Code: LDM70-WZERT

Option (surcharge):
Factory calibration certificate (traceable)
Can only be ordered together with new instrument.
11 test points (incl. zero point)
(Measuring range 600 bar: 5 test points)