Anyone Here Using Lascar M-Series Panel Meters?

I looked at the data sheet but it doesn't give the input impedance on the input. Do you happen to know what it is?

John

Hi John

Yes, it's 10M ohms.

Thanks

Chris High

Lascar Marketing Team

Thanks Chris,

I also should have asked what the resolution is.

John

Hi John

This is on the latest datasheet which I've sent to Farnell for them to update. Here's the relevant section:

Voltage Input

The SGD 28-M features 2 voltage inputs, which use a Programmable Gain Amplifier (PGA) to make the best use of available resolution (the smallest voltage range offers the highest resolution). Each channel can be programmed independently, with the option of eight different input voltage ranges:

The input voltage range is decided using the two voltages that the user enters in the scaling section of the Panel Pilot software. The software uses the smallest range available, which can accommodate both of the voltages entered by the user. The absolute maximum voltage input is 40V d.c.

Entering a voltage scale of 0 – 30V in the software will use the 0 – 40V range.

Entering a voltage scale of 0 – 3V in the software will use the 0 – 4V range.

Entering a voltage scale of 5 – 15V in the software will use the 0 – 20V range.

Voltage Range (V) / Resolution (mV)

0 - 1.25 / 0.3

0 - 2.5 / 0.6

0 - 4 / 1.0

0 - 5 / 1.2

0 - 8 / 2.0

0 - 10 / 2.4

0 - 20 / 4.9

0 - 40 / 9.8

Note: V+, IN1 and IN2 share a common ground (i.e. not floating or isolated from each other).

Rgds

Chris High

Lascar Marketing Team

Hi John

This is on the latest datasheet which I've sent to Farnell for them to update. Here's the relevant section:

Voltage Input

The SGD 28-M features 2 voltage inputs, which use a Programmable Gain Amplifier (PGA) to make the best use of available resolution (the smallest voltage range offers the highest resolution). Each channel can be programmed independently, with the option of eight different input voltage ranges:

The input voltage range is decided using the two voltages that the user enters in the scaling section of the Panel Pilot software. The software uses the smallest range available, which can accommodate both of the voltages entered by the user. The absolute maximum voltage input is 40V d.c.

Entering a voltage scale of 0 – 30V in the software will use the 0 – 40V range.

Entering a voltage scale of 0 – 3V in the software will use the 0 – 4V range.

Entering a voltage scale of 5 – 15V in the software will use the 0 – 20V range.

Voltage Range (V) / Resolution (mV)

0 - 1.25 / 0.3

0 - 2.5 / 0.6

0 - 4 / 1.0

0 - 5 / 1.2

0 - 8 / 2.0

0 - 10 / 2.4

0 - 20 / 4.9

0 - 40 / 9.8

Note: V+, IN1 and IN2 share a common ground (i.e. not floating or isolated from each other).

Rgds

Chris High

Lascar Marketing Team

Thanks for the information. I will check out the data sheet after Farnell gets it updated.

John